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#
# -------------------------------------------------------------------------
# Copyright (c) 2019 AT&T Intellectual Property
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
# -------------------------------------------------------------------------
#
import operator
import time
from valet.engine.app_manager.app import App
class AppHistory(object):
"""Data container for scheduling decisions."""
def __init__(self, _key):
self.decision_key = _key
self.status = None
self.result = None
self.timestamp = None
class AppHandler(object):
"""Handler for all requested applications."""
def __init__(self, _dbh, _use_dha, _logger):
self.dbh = _dbh
self.decision_history = {}
self.max_decision_history = 5000
self.min_decision_history = 1000
self.use_dha = _use_dha
self.logger = _logger
def validate_for_create(self, _req_id, _req):
"""Validate create request and return app."""
app = App(_req_id, self.use_dha, self.logger)
app.init_for_create(_req)
if app.status != "ok" and not app.status.startswith("na:"):
self.logger.error(app.status)
else:
self.logger.info("got 'create' for app = " + app.app_name)
return app
def validate_for_update(self, _req_id, _req):
"""Validate update request and return app."""
app = App(_req_id, self.use_dha, self.logger)
# Use create validation module.
app.init_for_create(_req)
app.state = "update"
if app.status != "ok" and not app.status.startswith("na:"):
self.logger.error(app.status)
else:
self.logger.info("got 'update' for app = " + app.app_name)
return app
def validate_for_delete(self, _req_id, _req):
"""Validate delete request and return app."""
app = App(_req_id, self.use_dha, self.logger)
app.init_for_delete(_req)
if app.status != "ok":
self.logger.error(app.status)
return app
prior_app = self.dbh.get_stack(app.app_name)
if prior_app is None:
return None
if len(prior_app) == 0:
app.status = "na: no prior request via valet"
return app
# Once taking prior app, valet deterimnes placements or error.
app.init_prior_app(prior_app)
self.logger.info("got 'delete' for app = " + app.app_name)
return app
def validate_for_confirm(self, _req_id, _req):
"""Validate confirm request and return app."""
app = App(_req_id, self.use_dha, self.logger)
app.init_for_confirm(_req)
if app.status != "ok":
self.logger.error(app.status)
return app
stack_id_map = self.dbh.get_stack_id_map(app.last_req_id)
if stack_id_map is None:
return None
if len(stack_id_map) == 0:
app.status = "na: not handled request via valet"
return app
prior_app = self.dbh.get_stack(stack_id_map.get("stack_id"))
if prior_app is None:
return None
if len(prior_app) == 0:
app.status = "cannot find prior stack info"
return app
# Once taking prior app, valet deterimnes placements or error.
app.init_prior_app(prior_app)
self.logger.info("got 'confirm' for app = " + app.app_name)
return app
def validate_for_rollback(self, _req_id, _req):
"""Validate rollback request and return app."""
app = App(_req_id, self.use_dha, self.logger)
app.init_for_rollback(_req)
if app.status != "ok":
self.logger.error(app.status)
return app
stack_id_map = self.dbh.get_stack_id_map(app.last_req_id)
if stack_id_map is None:
return None
if len(stack_id_map) == 0:
app.status = "na: not handled request via valet"
return app
prior_app = self.dbh.get_stack(stack_id_map.get("stack_id"))
if prior_app is None:
return None
if len(prior_app) == 0:
app.status = "cannot find prior stack info"
return app
# Once taking prior app, valet deterimnes placements or error.
app.init_prior_app(prior_app)
self.logger.info("got 'rollback' for app = " + app.app_name)
return app
def set_for_create(self, _app):
"""Set for stack-creation request."""
# Set Valet groups.
_app.init_valet_groups()
if _app.status != "ok":
return
# Set flavor properties for each server.
for rk, r in _app.stack.items():
if "vcpus" not in r["properties"].keys():
flavor = _app.resource.get_flavor(r["properties"]["flavor"])
if flavor is None:
_app.status = "fail to get flavor details"
self.logger.error(_app.status)
return
if flavor.status != "enabled":
# TODO(Gueyoung): what to do if flavor is disabled?
self.logger.warning("disabled flavor = " + flavor.name)
r["properties"]["vcpus"] = flavor.vCPUs
r["properties"]["mem"] = flavor.mem_cap
r["properties"]["local_volume"] = flavor.disk_cap
if len(flavor.extra_specs) > 0:
extra_specs = {}
for mk, mv in flavor.extra_specs.items():
extra_specs[mk] = mv
r["properties"]["extra_specs"] = extra_specs
# Set servers.
# Once parsing app, valet deterimnes placements or error.
if not _app.parse():
self.logger.error(_app.status)
return
return
def set_for_update(self, _app):
"""Set for stack-update request."""
# Set servers.
# Once parsing app, valet deterimnes placements or error.
if not _app.parse():
self.logger.error(_app.status)
return
# Skip stack-update and rely on platform at this version.
_app.status = "na:update: pass stack-update"
return
def check_history(self, _req_id):
"""Check if the request is determined already."""
if _req_id in self.decision_history.keys():
status = self.decision_history[_req_id].status
result = self.decision_history[_req_id].result
return status, result
else:
return None, None
def record_history(self, _req_id, _status, _result):
"""Record an app placement decision."""
if _req_id not in self.decision_history.keys():
if len(self.decision_history) > self.max_decision_history:
self._flush_decision_history()
app_history = AppHistory(_req_id)
app_history.status = _status
app_history.result = _result
app_history.timestamp = time.time()
self.decision_history[_req_id] = app_history
def _flush_decision_history(self):
"""Unload app placement decisions."""
count = 0
num_of_removes = len(self.decision_history) - self.min_decision_history
remove_item_list = []
for decision in (sorted(self.decision_history.values(), key=operator.attrgetter('timestamp'))): # type: AppHistory
remove_item_list.append(decision.decision_key)
count += 1
if count == num_of_removes:
break
for dk in remove_item_list:
del self.decision_history[dk]
def store_app(self, _app):
"""Store new app or update existing app."""
if _app.state == "create":
metadata = {"service_instance_id": _app.service_instance_id, "vnf_instance_id": _app.vnf_instance_id,
"vnf_instance_name": _app.vnf_instance_name}
servers = {}
for sk, s in _app.servers.items():
servers[sk] = s.get_json_info()
if not self.dbh.create_stack(_app.app_name,
_app.status,
_app.datacenter_id, _app.app_name, "none",
_app.tenant_id, metadata,
servers, {},
_app.state, "none"):
return False
elif _app.state in ("delete", "created"):
metadata = {"service_instance_id": _app.service_instance_id, "vnf_instance_id": _app.vnf_instance_id,
"vnf_instance_name": _app.vnf_instance_name}
if not self.dbh.update_stack(_app.app_name,
_app.status,
_app.datacenter_id, _app.app_name, _app.app_id,
_app.tenant_id, metadata,
_app.servers, _app.prior_servers,
_app.state, _app.prior_state):
return False
elif _app.state == "deleted":
if not self.dbh.delete_stack(_app.app_name):
return False
else:
self.logger.error("unknown operaton")
return False
# To manage the map between request_id and Heat stack requested
if _app.state in ("create", "delete"):
if not self.dbh.create_stack_id_map(_app.last_req_id, _app.app_name):
return False
elif _app.state in ("created", "deleted"):
if not self.dbh.delete_stack_id_map(_app.last_req_id):
return False
return True
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